The Spatio-Temporal Change and Driving Forces of Cultivated Land Quantity in Chang-Zhu-Tan Urban Agglomeration
基于1996-2009年数据，分析了长株潭城市群耕地数量的时空变化特征，发现耕地总量波动下降、人均耕地逐年减少，空间差异明显，社会经济水平、农业科技和结构调整是主要驱动力。
Based on the land use survey data and socio-economic statistical data from 1996 to 2009,this paper analyzed the spatio-temporal change and it's driving factors of cultivated land quantity in Chang-Zhu-Tan urban agglomeration by variation coefficient,theil index,relative change rate and the principal component analysis method,combining with the GIS technology.The results as follows: ①the change trend of cultivated land quantity was fluctuated decline,and per capita cultivated land area decreased year by year in Chang-Zhu-Tan urban agglomeration;②slow-fast-slowstaged development was the characteristics of spatial difference change of cultivated land quantity in Chang-Zhu-Tan urban agglomeration;③the spatial difference of cultivated land quantity change was obvious,cultivated land quantity decreased largely in most of district and county-level city,decreased a certain scale in most of county,and increased a certain scale in Ningxiang and Chaling county,relative change rate of cultivated land quantity was presented a municipal districtcounty-level citycountyspatial distribution;④socio-economic development level,innovation of agricultural science and technology and adjustment of agricultural structure were main driving forces of he cultivated land quantity change in Chang-Zhu-Tan urban agglomeration.The study results will provide a objective basis for cultivated land protection and socio-economic coordinated development,can provide a scientific reference for the same regions.